Servicing
Diaphragm pump N680 EX
30
Translation of Original Operation and Installation Instruction, english, KNF 325438 02/22
9.2 Cleaning
9.2.1 Flushing the pump
WARNING
Risk of explosion by flushing the pump with air
à
In potentially explosive areas or when using
the pump with explosive media, only permit
specialist to flush the pump with inert gas.
WARNING
Risk of burns from hot pump parts and/or hot
medium
Some pump parts may be hot during or after oper-
ation of the pump.
à
Allow the pump to cool after operation.
à
Take protective measures to protect against
touching hot parts.
à
Before switching off the pump under atmospheric conditions, flush for
several minutes with inert gas.
If there is no risk of explosion, flushing can also be performed with
air.
à
Discharge the media safely.
9.2.2 Cleaning the pump
WARNING
Risk of explosion from electrostatic charging of the
components
à
Only clean the pump with a damp cloth.
à
Only clean the pump with a damp cloth and non-flammable cleaning
agents.
à
Only use solvents during cleaning if head materials are not corroded
(ensure resistance of the material).
à
If compressed air is present, blow out the components.
9.3 Changing diaphragm and reed valves
Requirements
à
Disconnect the motor from mains and ensure that it is voltage-free.
à
Allow the pump and the motor to cool.
à
Clean the pump and free the pump of hazardous materials.
à
Remove the hoses/pipes from the pneumatic pump inlet and outlet.
With multi-headed pumps, parts of the various pump heads might become
mixed up.
à
Change the parts of the individual pump heads that are to be replaced
one at a time.
